In the first edition of the rules they used to be something towards the effect that you cannot turn a for from neutral and then again to a friend all in one diplomacy phase.
Sonehow I can't find that anymore in the second version of the rules. What I am I missing or is this an intended change?

No, in 2nd edition I thought you were limited to targeting a particular country only once per Diplomacy phase.

French- aligned countries cannot become
coalition-aligned countries in 1 diplomacy phase ,
and vice versa.